Enable Canvas approach for demo app

Author: markushi

sentry-samples/sentry-samples-android/src/main/AndroidManifest.xml

@@ -182,6 +182,7 @@
 
       <meta-data android:name="io.sentry.performance-v2.enable" android:value="true" />
 
+      <meta-data android:name="io.sentry.session-replay.screenshot-strategy" android:value="canvas" />
       <meta-data android:name="io.sentry.session-replay.session-sample-rate" android:value="1" />
       <meta-data android:name="io.sentry.session-replay.mask-all-text" android:value="true" />
     </application>